Thousands of commuters suffered an appalling start to the week with three Tube lines either part suspended or running with delayed services.Problems still remain on the Circle, District and Hammersmith & City lines following a signal failure.
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Inspectors found a culture of bullying and major problems with poor ambulance response times at the trust, which is the biggest in the UK.
More than a tenth of the Piccadilly Line train fleet is out of action because of emergency repairs to damaged wheels.
Rows of students stood and turned their backs before filing out of the lecture theatre.